Johari-Goldstein relaxation in quenched and irradiated chalcogenide glasses
Year: 2025
Type: article
Abstract: glasses. High-enthalpy states are reached by two methods: (1) increasing the cooling rate used to quench the melt and (2) irradiating the glass with X-rays. Both methods make the JG relaxation visible in the calorimetric traces, where it appears as an exothermic signal at temperatures below the glass transition. The JG relaxation can be associated with mobile regions produced by quenching or defect regions produced by irradiation. These findings strongly support a general connection between the JG relaxation and local defect regions in the glass network and offer a new strategy to control via X-ray irradiation a key feature of the glass transition and, thereby, the related mechanical properties of the glass.
Source: Newton
Authors: Jacopo Baglioni, Alessandro Martinelli, Peihao Sun, Francesco Dallari, Lara Piemontese, Muhammad Umair, Fabian Westermeier, Michael Sprung, Giulio Monaco
Institutions: University of Padua, Deutsches Elektronen-Synchrotron DESY
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,460
OpenAlex ID: W7116050258